3. If three numbers in the ratio 3 : 2: 5 be such that the sum of their squares is 1862, the middle number will be
10
14
18
22
Answer: Option B
Explanation:
Let the numbers be 3x, 2x and 5x.
Then,
9x + 4x + 25x =1862
⇒ 38x = 1862
⇒ x = 49 ⇒ x = 7.
middle number = 2x = 14
4. The sum of three numbers is 98. If the ratio of the first to the second is 2:3 and that of the second to the third is 5:8, then the second number is